Input timing in DDR mode with loopback DQS sampling

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Input timing in DDR mode with loopback DQS sampling

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goto11
Contributor III

Hello,

 

I have two questions about QuadSPI's Input timing in DDR mode with loopback DQS sampling.
No1
Is it a mode that can be used with serial flash without DQS?
No2
Can the QSPI_A_DQS (EPDC1_DATA04) pin be open when used in this mode?
Or does the QSPI_A_DQS (EPDC1_DATA04) pin connect to any pin?

 

Regards,

Goto

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Yuri
NXP TechSupport
NXP TechSupport

@goto11 
Hello,

   It is possible to use DDR QSPI flash without DQS, assuming
the loopback. Add 18pf on the DQS pin.

Regards,
Yuri.

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344 Views
Yuri
NXP TechSupport
NXP TechSupport

@goto11 
Hello,

   It is possible to use DDR QSPI flash without DQS, assuming
the loopback. Add 18pf on the DQS pin.

Regards,
Yuri.

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